Example #1
0
File: ssh.go Project: jordic/k8s
func makeSSHTunnel(user string, signer ssh.Signer, host string) (*SSHTunnel, error) {
	config := ssh.ClientConfig{
		User: user,
		Auth: []ssh.AuthMethod{ssh.PublicKeys(signer)},
	}
	return &SSHTunnel{
		Config:  &config,
		Host:    host,
		SSHPort: "22",
	}, nil
}
Example #2
0
File: ssh.go Project: jordic/k8s
// Internal implementation of runSSHCommand, for testing
func runSSHCommand(dialer sshDialer, cmd, user, host string, signer ssh.Signer) (string, string, int, error) {
	if user == "" {
		user = os.Getenv("USER")
	}
	// Setup the config, dial the server, and open a session.
	config := &ssh.ClientConfig{
		User: user,
		Auth: []ssh.AuthMethod{ssh.PublicKeys(signer)},
	}
	client, err := dialer.Dial("tcp", host, config)
	if err != nil {
		return "", "", 0, fmt.Errorf("error getting SSH client to %s@%s: '%v'", user, host, err)
	}
	session, err := client.NewSession()
	if err != nil {
		return "", "", 0, fmt.Errorf("error creating session to %s@%s: '%v'", user, host, err)
	}
	defer session.Close()

	// Run the command.
	code := 0
	var bout, berr bytes.Buffer
	session.Stdout, session.Stderr = &bout, &berr
	if err = session.Run(cmd); err != nil {
		// Check whether the command failed to run or didn't complete.
		if exiterr, ok := err.(*ssh.ExitError); ok {
			// If we got an ExitError and the exit code is nonzero, we'll
			// consider the SSH itself successful (just that the command run
			// errored on the host).
			if code = exiterr.ExitStatus(); code != 0 {
				err = nil
			}
		} else {
			// Some other kind of error happened (e.g. an IOError); consider the
			// SSH unsuccessful.
			err = fmt.Errorf("failed running `%s` on %s@%s: '%v'", cmd, user, host, err)
		}
	}
	return bout.String(), berr.String(), code, err
}